Tech Controllers EU-2801 WiFi User manual

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EU- 2801 WiFi

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TABLE OF CONTENTS
I. SAFETY........................................................................................................................................................................ 4
II. DEVICE DESCRIPTION.................................................................................................................................................5
III. How to install.............................................................................................................................................................6
IV. Main screen description............................................................................................................................................ 7
V. Controller menu......................................................................................................................................................... 8
1. Block diagram of main menu....................................................................................................................................8
2. WiFi module .............................................................................................................................................................9
3. Date and time...........................................................................................................................................................9
3.1. Clock settings................................................................................................................................................... 9
3.2. Date settings.................................................................................................................................................... 9
4. Mode ........................................................................................................................................................................ 9
4.1. Automatic ........................................................................................................................................................ 9
4.2. Heating ............................................................................................................................................................ 9
4.3. Reduction......................................................................................................................................................... 9
4.4. Only DHW ...................................................................................................................................................... 10
4.5. Party............................................................................................................................................................... 10
4.6. Absent............................................................................................................................................................10
4.7. Holiday........................................................................................................................................................... 10
4.8. OFF.................................................................................................................................................................10
5. Screen settings ....................................................................................................................................................... 10
6. Clock settings.......................................................................................................................................................... 10
7. Protections ............................................................................................................................................................. 11
8. Heating circuit ........................................................................................................................................................ 11
8.1. Type of control............................................................................................................................................... 11
8.2. Pre-set room temperature ............................................................................................................................ 13
8.3. Reduced pre-set room temprature ............................................................................................................... 13
8.4. Minimum supply temperature ...................................................................................................................... 13
8.5. Maximum supply temperature...................................................................................................................... 13
9. Hot water ............................................................................................................................................................... 13
9.1. DHW temperature .........................................................................................................................................13
9.2. Reduced DHW temperature ..........................................................................................................................13
9.3. DHW OFF outside settings............................................................................................................................. 13
10. Settings .............................................................................................................................................................. 13
10.1. Heating system protection ............................................................................................................................13
10.2. Summer ......................................................................................................................................................... 13
10.3. Type of sensor ............................................................................................................................................... 14

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10.4. Sensor calibration ..........................................................................................................................................14
11. Weekly control...................................................................................................................................................14
12. Language............................................................................................................................................................14
13. Software version ................................................................................................................................................ 14
14. Service menu...................................................................................................................................................... 15
VI. How to configure the module ................................................................................................................................. 15
1. HOME TAB............................................................................................................................................................ 16
2. USER MENU ......................................................................................................................................................... 16
3. SETTINGS TAB ..................................................................................................................................................... 16
VII. Technical data..........................................................................................................................................................17
VIII. Alarms...................................................................................................................................................................... 18
KN.2020.09.10

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I. SAFETY
Before using the device for the first time the user should read the following regulations carefully. Not obeying the rules
included in this manual may lead to personal injuries or controller damage. The user’s manual should be stored in a safe
place for further reference. In order to avoid accidents and errors it should be ensured that every person using the device
has familiarized themselves with the principle of operation as well as security functions of the controller. If the device is
to be sold or put in a different place, make sure that the user’s manual is there with the device so that any potential user
has access to essential information about the device. The manufacturer does not accept responsibility for any injuries or
damage resulting from negligence; therefore, users are obliged to take the necessary safety measures listed in this manual
to protect their lives and property.
WARNING
High voltage! Make sure the regulator is disconnected from the mains before performing any activities involving
the power supply (plugging cables, installing the device etc.).
The device should be installed by a qualified electrician.
The regulator should not be operated by children.
WARNING
The device may be damaged if struck by a lightning. Make sure the plug is disconnected from the power supply
during storm.
Any use other than specified by the manufacturer is forbidden.
Before and during the heating season, the controller should be checked for condition of its cables. The user
should also check if the controller is properly mounted and clean it if dusty or dirty.
Changes in the merchandise described in the manual may have been introduced subsequent to its completion on
10.09.2020. The manufacturer retains the right to introduce changes to the structure. The illustrations may include
additional equipment. Print technology may result in differences in colours shown.
We are committed to protecting the environment. Manufacturing electronic devices imposes
an obligation of providing for environmentally safe disposal of used electronic components
and devices. Hence, we have been entered into a register kept by the Inspection For
Environmental Protection. The crossed-out bin symbol on a product means that the product
may not be disposed of to household waste containers. Recycling of wastes helps to protect
the environment. The user is obliged to transfer their used equipment to a collection point
where all electric and electronic components will be recycled.

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II. DEVICE DESCRIPTION
EU-2801 WiFi multi-purpose room regulator is intended for controlling gas boilers with OpenTherm communication
protocol. The device enables the user to control room temperature (CH circuit) as well as domestic hot water temperature
(DHW) without the need to go to the boiler room.
Functions offered by the controller:
Smart control of room temperature
Smart control of the pre-set CH boiler temperature
Adjusting pre-set room temperature on the basis of current external temperature (weather-based control)
Weekly house&DHW heating schedule
Informing about heating device alarms
Alarm clock
Auto lock
Anti-freeze function
Controller equipment:
Large touch screen
Built-in room sensor
Flush-mountable
To the EU-2801 WiFi controller is attached room sensor C-mini. Such sensor is installed in particular heating zone. Is
provide the main controller current room temperature reading. Room sensor should be registered in a particular zone.
In order to do it, use <Registration>. Select <Registration> icon and press the communication button on a particular
C-mini sensor. Once the registration process has been completed successfully, the main controller display will show an
appropriate message.
Once registered, the sensor cannot be unregistered, but only switch off.
Technical data of the C-mini sensor:
Range of temperature measurement
-300C÷500C
Operation frequency
868MHz
Accuracy of measurement
0,50C
Power supply
CR2032 battery

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III. HOW TO INSTALL
The controller should be installed by a qualified person. The device is intended to be installed on the wall.
WARNING
EU-2801 WiFi controller is intended to be installed in a flush-mounting box. It is powered with 230V/50Hz –the
cable should be plugged directly into the connection terminal of the controller. Before
assembling/disassembling, disconnect from the power supply.
1. Attach the back cover to the wall in the place where the room regulator in the electrical box will be installed.
2. Connect the wires.
NOTE
The order of wires connecting OpenTherm device with EU-2801 WiFi controller does not matter.
3. Mount the devices on the latches.

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IV. MAIN SCREEN DESCRIPTION
1. Current CH boiler operation mode
2. Current time and day of the week –tap on this icon to set time and day of the week.
3. CH boiler icon:
- flame in the CH boiler –CH boiler is active
- no flame –CH boiler is damped
4. Current and pre-set DHW temperature –tap on this icon to change the pre-set temperature of domestic hot
water
5. Current and pre-set room temperature –tap on this icon to change the pre-set room temperature.
6. External temperature
7. Enter controller menu
8. WiFi signal–tap on this icon to check the signal strength, IP number and view WiFi module settings.
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V. CONTROLLER MENU
1. BLOCK DIAGRAM OF MAIN MENU
Menu
WiFi module
ON
WiFi network selection
Registration
DHCP
Module version
Date and time Clock settins
Date settings
Mode
Automatic
Heating
Reduction
Only DHW
Party
Absent
Holiday
OFF
Screen settings
Screensaver
Screen brightness
Screen blanking
Blanking time
Alarm clock settings
OFF
Active on selected days
Active once
Wake up time
Wake up day
Protection
Auto-lock ON
Auto-lock OFF
PIN code auto-lock
Heating circuit
Hot water
DHW temperature
Reduced DHW temperature
DHW OFF outside settings
Settings
Weekly control House heating
Hot water
Language
Software version
Service menu

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2. WIFI MODULE
Internet module is a device enabling the user remote control of the
heating system. The user controls the status of all heating system
devices on a computer screen, a tablet or a mobile phone.
After switching the module on and selecting DHCP option, the
controller automatically downloads parameters from the local
network.
3. DATE AND TIME
3.1. CLOCK SETTINGS
This option is used to set current time which is displayed in the main screen view. Use icons: and to set the
desired value and confirm by pressing OK
3.2. DATE SETTINGS
This option is used to set current time which is displayed in the main screen view. Use icons: and to set the
desired value and confirm by pressing OK.
4. MODE
The user may choose one of eight operation modes available.
4.1. AUTOMATIC
The controller operates according to user-defined temporary program –house heating and DHW heating only in pre-
defined hours.
4.2. HEATING
The controller operates according to <Pre-set room temperature> parameter (in <Heating circuit> submenu) and <DHW
temperature> parameter (in <Hot water> submenu) regardless of current time and day of the week.
4.3. REDUCTION
The controller operates according to <pre-set room temperature reduction> parameter (in <Heating circuit> submenu)
and <DHW reduction> parameter (in <Hot water> submenu) regardless of current time and day of the week. For this
function it is necessary to use a reduction in heating reduction.

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4.4. ONLY DHW
The controller only supports the hot water circuit (heating circuit off) according to the settings <Temp. DHW> (set in the
<Hot water> submenu) and Weekly settings.
4.5. PARTY
The controller operates according to <Pre-set room temperature> parameter (in <Heating circuit> submenu) and <DHW
temperature> parameter (in <Hot water > submenu) for a user-defined period of time.
4.6. ABSENT
Both circuits remain deactivated until the time pre-defined by the user. Only anti-freeze function remains active (if it has
been activated beforehand).
4.7. HOLIDAY
Both circuits remain deactivated until the day pre-defined by the user. Only anti-freeze function remains active (if it has
been activated beforehand).
4.8. OFF
The controller deactivates both circuits for a non-specified time. Only anti-freeze function remains active (if it has been
activated beforehand).
5. SCREEN SETTINGS
The user may adjust screen settings to individual needs.
6. CLOCK SETTINGS
This function is used to configure clock settings.
OFF –when this option is selected, the alarm clock function
isinactive.
Active on selected days –The alarm clock goes off only on
selected days.
Once –When this option is selected, the alarm clock goes
off only once at a pre-set waking-up time.
Waking-up time –Use icons to set the waking-up
time. Tap on <OK> to confirm.
Waking-up day - Use icons to set the waking-up
day. Tap on <OK> to confirm.

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7. PROTECTIONS
This function enables the user to activate and deactivate the auto-lock.
When auto-lock is active, it is necessary to enter PIN code in order to
access the controller menu.
NOTE
Default PIN code is „0000”.
8. HEATING CIRCUIT
* Displayed when the <Constant temperature> function is activated
** Displayed when the <Weather> function is enabled
8.1. TYPE OF CONTROL
Constant temperature –when this option is active, the user may edit the parameters available in the <Settings>
submenu.
Settings - this function is used to define the pre-set CH boiler temperature without the use of external sensor.
The user may set desired temperature of the CH boiler. The boiler remains active in the periods defined in the
Weekly schedule. Outside these periods the device does not work. Additionally, when the thermostat function
has been activated, the CH boiler is damped when the pre-set room temperature has been reached (when the
thermostat function is switched off, reaching the pre-set room temperature will result in decreasing the pre-set
CH boiler temperature). The room will be heated to reach the pre-set temperature in the periods defined in the
Weekly schedule.
Heating circuit
Type of control
Constant
temperature
Weather
Settings
Pre-set boiler
temperature*
Heating curve**
Heating reduction
Active room
thermostat
Room sensor
influence
Pre-set room
temperature
Reduced pre-set
room temperature
Minimum supply
temperature
Maximum supply
temperature

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The <Heating reduction> function - This parameter is connected with the Weekly schedule which enables the
user to define the time periods for each day of the week when the CH boiler will operate based on the pre-set
temperature settings. After activating the thermostat and setting the Heating reduction function at Decrease,
the CH boiler will operate in two modes. In the weekly schedule periods the CH boiler will heat the rooms to
reach the pre-set temperature whereas outside these periods the CH boiler heat the rooms the the temperature
of pre-set temperature decrease.
Weather –After selecting this function, the pre-set CH boiler temperature depends on the outside temperature
value. The user sets the Weekly schedule settings.
Settings –this function (apart from the possibility of setting the heating reduction and room thermostat - as in
the case of constant temperature) also serves to define the Heating curve and Influence of the room sensor.
The user may set the following parameters:
Heating curve –it serves to define the pre-set CH
boiler temperature based on the outside
temperature. In our controller the curve consists of
four points of external temperature :
10°C, 0°C, -10°C and -20°C.
Once the heating curve has been defined, the controller
reads the outside temperature value and adjusts the
pre-set boiler temperature accordingly.
Influence of the room sensor –activating this function results in more dynamic heating to reach the
pre-set value in case of significant temperature difference (e.g. when we want to reach the pre-set room
temperature quickly after airing the room). By setting the hysteresis of this function, the user may
decide how big the influence should be.
Room temperature difference –this setting is used to define a single unit change in the current room
temperature at which a pre-defined change in the pre-set temperature of the CH boiler will be
introduced.
Example:
Room temperature difference 0,5°C
Change of pre-set CH boiler temperature 1°C
Pre-set CH boiler temperature 50°C
Pre-set temperature of the room regulator 23°C
Case 1. If the room temperature increases to 23,5°C (by 0,5°C), the pre-set CH boiler temperature
changes to 49°C (by 1°C).
Case 2. If the room temperature drops to 22°C (by 1°C) , the pre-set CH boiler temperature changes to
52°C (by 2°C).
Change of pre-set temperature –this function is used to define by how many degrees the pre-set CH
boiler temperature is to increase or decrease with a single unit change in the room temperature (see:
Room temperature difference). This function is available only with TECH room regulator and it is closely
related to <Room temperature difference parameter>.

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8.2. PRE-SET ROOM TEMPERATURE
This parameter is used to define the pre-set room temperature (daytime comfort temperature). This parameter is used
e.g. in the temporary program –it applies for the time specified in this program.
8.3. REDUCED PRE-SET ROOM TEMPRATURE
This parameter is used to define the reduced pre-set room temperature (nighttime economical temperature). This
parameter is used e.g. in reduction mode.
8.4. MINIMUM SUPPLY TEMPERATURE
This parameter is used to define minimum pre-set CH boiler temperature - the pre-set temperature may not be lower
than the value defined in this parameter. In some cases the pre-set CH boiler temperature may be controlled with
operation algorithm (e.g. in weather-based control in case of external temperature increase) but it will never be reduced
below this value.
8.5. MAXIMUM SUPPLY TEMPERATURE
This parameter is used to define maximum pre-set CH boiler temperature - the pre-set temperature may not be higher
than the value defined in this parameter. In some cases the pre-set CH boiler temperature may be controlled with
operation algorithm but it will never exceed this value.
9. HOT WATER
9.1. DHW TEMPERATURE
This parameter is used to define the pre-set hot water temperature. This parameter is used e.g. in the temporary program
–it applies for the time specified in this program.
9.2. REDUCED DHW TEMPERATURE
This parameter is used to define the reduced pre-set hot water temperature. This parameter is used e.g. in reduction
mode.
9.3. DHW OFF OUTSIDE SETTINGS
If this option is selected, domestic hot water will not be heated outside the periods specified in weekly control settings.
10. SETTINGS
10.1. HEATING SYSTEM PROTECTION
Once this function has been activated, the user defines the pre-set temperature. If the external temperature drops below
this value, the controller activates the pump which operates until the temperature is raised and maintained for 6 minutes.
When this function is active, the controller also monitors the CH boiler temperature. If it drops below 10⁰C, the fire-up
process is initiated and the flame is sustained until the CH boiler temperature exceeds 15⁰C.
10.2. SUMMER
When this function is active, the controller continuously monitors the external temperature. If the threshold temperature
is exceeded, the heating circuit is switched off.

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10.3. TYPE OF SENSOR
The controller has a built-in sensor but is is also possible to use an additional wireless sensor. Such a sensor must be
registered using one of the options: <Wireless sensor> or <Registration>. Next, press the communication button on the
sensor within 30 seconds. If the registration process has been successful, the controller will display a message to confirm.
If an additional sensor has been registered, the main display will show information about WiFi signal and battery level.
NOTE
If the battery is flat or there is no communication between the sensor and the controller, the controller will use
the built-in sensor.
10.4. SENSOR CALIBRATION
Sensor calibration should be performed during installation or after a longer period of using the regulator when the room
temperature (room sensor) or external temperature (external sensor) measured by the sensor is different from actual
temperature. Range of regulation is -10 to +10 ⁰C with the accuracy of 0,1°C.
11. WEEKLY CONTROL
The user may configure a weekly control schedule for house and domestic hot water heating on particular days of the
week and hours. It is possible to create 3 time periods for each week using UP and DOWN arrows. The settings for a
particular day may be copied into next ones.
Select the day to be configured.
Select the heating periods which will be active and
configure their time limits.
Within the time periods the controller will operate
according to pre-set temperature settings. Outside these
periods the controller operation is configured by the user
in Heating circuit -> Type of control -> Weather-based
control -> Heating reduction –if <ON/OFF> is selected,
the controller deactivates a given circuit whereas if
<Reduced> is selected, the controller operates according
to reduced temperature settings.
12. LANGUAGE
This option is used to select the software language preferred by the user.
13. SOFTWARE VERSION
Tap on this icon to view the CH boiler manufacturer’s logo, the software version.
NOTE
When contacting Service Department of TECH company it is necessary to provide the software version number.

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14. SERVICE MENU
This function is used to configure advanced settings. Service menu should be accessed by a qualified person and it is
protected with a 4-digit code.
VI. HOW TO CONFIGURE THE MODULE
The website offers multiple tools for controlling your heating system. In order to take full advantage of the technology,
create your own account:
Creating a new account at emodul.pl
Once logged in, go to Settings tab and select Register module. Next, enter the code generated by the controller (to
generate the code, select Registration in EU-2801 WiFi menu). The module may be assigned a name (in the are labelled
Module description).
New module registration screen

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1. HOME TAB
Home tab displays the main screen with tiles illustrating the current status of particular heating system devices. Tap on
the tile to adjust the operation parameters:
Screenshot presenting an example tab with main menu parameters
2. USER MENU
In the User menu it is possible to set the operating modes, boiler week and hot water and other parameters according
to your needs.
User menu tab view - Weekly settings
3. SETTINGS TAB
Settings tab enables the user to register a new module and change the e-mail address or the password:

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Screenshot showing the tab Settings
VII. TECHNICAL DATA
Specification
Value
Range of room temperature setting
from 5°C to 40°C
Supply voltage
230V +/- 10% / 50Hz
Power consumption
1,3W
Accuracy of room temperature measurement
+/- 0,5°C
Operating temperature
from 5°C to 50°C
Freuency
868MHz
Transmission
IEEE 802.11 b/g/n

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VIII. ALARMS
EU-2801 WiFi room temperature regulator signalises all alarms which occur in the main controller. In case of alarm, the
regulator activates a sound signal and the screen displays a message with error ID.
NOTE
In most cases, in order to remove an alarm it is necessary to delete it in the CH boiler controller.

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EU Declaration of conformity
Hereby, we declare under our sole responsibility that EU-2801 WiFi manufactured by TECH STEROWNIKI, head-
quartered in Wieprz Biała Droga 31, 34-122 Wieprz, is compliant with Directive 2014/53/EU of the European parliament
and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available
on the market of radio equipment, Directive 2009/125/EC establishing a framework for the setting of ecodesign
requirements for energy-related products as well as the regulation by the MINISTRY OF ENTREPRENEURSHIP AND
TECHNOLOGY of 24 June 2019 amending the regulation concerning the essential requirements as regards the restriction of
the use of certain hazardous substances in electrical and electronic equipment, implementing provisions of Directive (EU)
2017/2102 of the European Parliament and of the Council of 15 November 2017 amending Directive 2011/65/EU on the
restriction of the use of certain hazardous substances in electrical and electronic equipment (OJ L 305, 21.11.2017, p. 8).
For compliance assessment, harmonized standards were used:
PN-EN IEC 60730-2-9 :2019-06 art. 3.1a Safety of use
PN-EN IEC 62368-1:2020-11 art. 3.1 a Safety of use
PN-EN 62479:2011 art. 3.1 a Safety of use
ETSI EN 301 489-1 V2.2.3 (2019-11) art.3.1b Electromagnetic compatibility
ETSI EN 301 489-3 V2.1.1 (2019-03) art.3.1 b Electromagnetic compatibility
ETSI EN 301 489-17 V3.2.4 (2020-09) art.3.1b Electromagnetic compatibility
ETSI EN 300 328 V2.2.2 (2019-07) art.3.2 Effective and coherent use of radio spectrum
ETSI EN 300 220-2 V3.2.1 (2018-06) art.3.2 Effective and coherent use of radio spectrum
ETSI EN 300 220-1 V3.1.1 (2017-02) art.3.2 Effective and coherent use of radio spectrum
Wieprz, 10.09.2020

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